[feys-boo k]
verb (used with object)
  1. to communicate with (a person) or search for information about (a person) by using Facebook: My old boyfriend just Facebooked me. His future employer Facebooked him and decided to withdraw the job offer.
  2. to post on Facebook: I facebooked some photos of my cat. You should Facebook the event so more people will show up.
verb (used without object)
  1. to use Facebook: Does your mom Facebook?
Also face·book for defs 2–4.

Origin of Facebook

1980–85; facebook, college student directory with personal photos and basic information

Usage note

The official trademarked name of the social-media platform and website is spelled “facebook,” all lowercase letters. Formal writing style—as exemplified by most news and book publishers—is to treat such names as regular proper nouns, in this case “Facebook,” using an initial capital letter. However, when a trade name begins with a lowercase letter followed by an uppercase one, such as eBay or iPad, this spelling is retained, even at the beginning of a sentence.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for facebook

Contemporary Examples of facebook

Historical Examples of facebook

  • Civilisation waits for himall-enfolding, all-instructing civilisation, and he stands face to facebook in handwith his last chance.

    The Lost Art of Reading

    Gerald Stanley Lee

British Dictionary definitions for facebook


noun trademark
  1. a popular social networking website
  1. (tr; sometimes not capital) to search for (a person's profile) on the Facebook website
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for facebook

directory listing names and headshots, by 1983, originally U.S. college students, from face (n.) + book. The social networking Web site dates from 2004.

Online Etymology Dictionary, © 2010 Douglas Harper